Search found 211 matches

by Jeroen Vriesman
Thu Mar 10, 2011 11:06 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Parts for HV setup for Demo Fusor
Replies: 10
Views: 3346

Re: Parts for HV setup for Demo Fusor

<t>Connect 2 of your "microwave oven diodes" in series to rectify upto 20kV, or 3 for 30kV<br/> <br/> You need a very high resistor parallel to the diodes in order to balance the reverse voltage.<br/> <br/> e.g. if you would allow 10 microamps of reverse current en 10kV per diode, the resistance wou...
by Jeroen Vriesman
Mon Feb 21, 2011 2:24 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: PMT Voltage Divider Calculator
Replies: 7
Views: 4966

Re: PMT Voltage Divider Calculator

<t>Would it be a good idea to just lower the bandwidth of every divider stage by adding an extra capacitor across every resistor in the divider?<br/> Normally we see capacitors across the resistors in the last few stages of the divider, to prevent a dip in the voltage when the photocurrent flows to ...
by Jeroen Vriesman
Mon Feb 21, 2011 2:07 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Counting with PRA
Replies: 3
Views: 1824

Re: Neutron Counting with PRA

video seems to be "private", unable to see it.
by Jeroen Vriesman
Mon Feb 21, 2011 2:05 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Manual for troubleshooting and upgrading of neutron generators
Replies: 2
Views: 2076

Re: Manual for troubleshooting and upgrading of neutron generators

Great reading indeed, lots of useful information, input input, megabytes of input
Thanks.
by Jeroen Vriesman
Fri Feb 11, 2011 8:03 pm
Forum: Vacuum Technology (& FAQs)
Topic: TPU 110
Replies: 2
Views: 1917

TPU 110

Does anyone here have the specs of the TPU110 turbo pump?

I'm looking for
1) the connections
2) motor specs, phases, power, max current, frequency
3) temperature sensor specs

and all other usefull info about the TPU110

thnx,
Jeroen.
by Jeroen Vriesman
Wed Feb 09, 2011 7:35 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: correct voltage for HARSHAW NAL(TI) 12S12/3 SCINTILLATION DETECTOR 3"
Replies: 8
Views: 3942

Re: correct voltage for HARSHAW NAL(TI) 12S12/3 SCINTILLATION DETECTOR 3"

<r>Hi,<br/> <br/> found some very good documentation about PMT's, you can download it from my blog:<br/> <URL url="http://nuclearfusionreactor.blogspot.com/2011/02/neutron-detector.html"><LINK_TEXT text="http://nuclearfusionreactor.blogspot.co ... ector.html">http://nuclearfusionreactor.blogspot.com...
by Jeroen Vriesman
Wed Feb 09, 2011 7:23 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Using ultracapacitors for high current source of inductive power
Replies: 22
Views: 6014

Re: Using ultracapacitors for high current source of inductive power

IEC fusion doesn't work with "temperature", it is the electric field of the virtual cathode which attracts the positive ions towards the center.

Having a "pre-heated" "plasma" just creates some noise I think, maybe even less fusion.
by Jeroen Vriesman
Wed Feb 09, 2011 7:19 pm
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum power feedthrough
Replies: 2
Views: 1706

Re: Vacuum power feedthrough

<t>Well, I have them because I could buy them cheap...<br/> <br/> My app won't need more than 50 amp (but I will need cooled coils for that...), still got a long way to go, have to build everything out of "whatever I can get my hands on".<br/> <br/> 5kV isn't much, but maybe I can make the cascade i...
by Jeroen Vriesman
Wed Feb 09, 2011 2:08 pm
Forum: Vacuum Technology (& FAQs)
Topic: Zamak
Replies: 1
Views: 1360

Zamak

Would it be possible to use Zamak (Zn-Mg-Al-Cu alloy) in vacuum?
The alloy is easy to cast.
by Jeroen Vriesman
Wed Feb 09, 2011 10:47 am
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum power feedthrough
Replies: 2
Views: 1706

Vacuum power feedthrough

<r>I've bought some power feedthrough material, you can see the pictures on my blog: <br/> <URL url="http://nuclearfusionreactor.blogspot.com">http://nuclearfusionreactor.blogspot.com</URL><br/> Does anyone recognize them, if I know the manufacturer I can find the real specs (I don't really believe ...